my only auditory hallucination was last time I was in a sever mixed state, I was up for 5 days with no sleep at all. about 3 am on the last day I started hearing a voice just say over and over and over "go to bed". so it gave me good advice and I listened.
I've also heard police outside my house, like sirens and them calling me out. those ones aren't good. but they were also during the same mixed state.